Key for the identification of the known mines of British
insects (Diptera and non-Diptera) recorded on Ammi

1a > Leaf-miner: A large blotch, yellow or brown, preceded by a short corridor that
in the end mostly is completely overrun. Generally several larvae
share a mine. Especially in fresh mines the green primary and secondary
feeding lines are well visible. Pupation outside the mine.

Polyphagous. On numerous genera of Apiaceae and possibly some Asteraceae, including Ammi, in Britain
and elsewhere. Throughout the British Isles. Also recorded in
the Republic of Ireland and most of the Palaearctic region, as
far east as Afghanistan.

Branched,
whitish, upper-surface corridor; main axis overlying the midrib;
side branches overlying the main lateral veins. (In Campanula and Phyteuma the mine is much less branched, sometimes nothing
more than a corridor on top of the midrib). Frass in rather long
strings. Usually the mines begins as a long and narrow, shallow,
tortuous lower-surface corridor that ends upon the midrib but otherwise
is not associated with the leaf venation. Often this initial corridor
is filled with callus, and then even less conspicuous. Pupation
outside the mine (Bladmineerders van Europa).

A
linear mine on the upper surface, usually following the midrib and
showing side branches along the veins. The frass is in strings (British
leafminers).

Polyphagous. On more than 40 host genera in 15 families, but not yet on Ammi, in Britain. Widespread
throughout Britain. Also recorded in the Republic of Ireland. Widespread in continental Europe.